Sexual Reproduction in Flowering Plants Question 29
29. An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is :
[2012]
(a) Cuticle
(b) Sporopollenin
(c) Lignin
(d) Cellulose
Show Answer
Answer : b
Hints & Solutions
(b) Sporopollenin is fatty substance present in pollen wall and provides resistance against extremes conditions like high temperature, acid, bases.
